Mounting for supporting two hydraulic pumps in axial alignment with a driving shaft



United States Patent Inventor Edmund 0. Howell New Holland, Pennsylvania App]. No. 815,787 Filed April 14, 1969 Patented Aug. 1 1, I970 Assignee Sperry Rand Corporation New Holland, Pennsylvania a Corp. of Delaware.

MOUNTING FOR SUPPORTING TW O HYDRAULIC PUMPS IN AXIAL ALIGNMENT WITH A DRIVING SHAFT 9 Claims, 3 Drawing Figs.

US. Cl 92/l2.2, 64/4, 64/ I 3 Int. Cl F04b 21/00 Field of Search I03/218, 4, 5; 230/235, 33, 37, 38,39,158

References Cited UNITED STATES PATENTS 1,991,342 2/1935 Ball l03/2l8XR 2,543,564 2/1951 Bakewell 103/2l8XR Primary Examiner- Robert M. Walker Attorneys-Joseph A. Brown, John C. Thompson, James J. Kennedy and George C. Bower ABSTRACT: A rigid mounting member has a beam extending transversely between two longitudinally extending frame members and two flanges attached to the frame members. Two hydraulic pumps are fastened to the flanges with the input shafts extending towards one another in axial alignment and secured to axially aligned drive means rotatably mounted in bearings supported by the mounting member.

-i TE 25 23 Patented Au 11, 1970 INVENTOR EDMUND O. HOWELL MOUNTINGFOR SUPPORTING TWO HYDRAULIC PUMPS IN AXIAL ALIGNMENT WITH A DRIVING SHAFT BACKGROUND OF THE INVENTION This invention relates to mounting means for two hydraulic pumps driven from a single drive.

Many of the self-propelled agricultural machines are driven and turned by two large front wheels which also carry the major portion of the weight of the tractor and header. These wheels are separately driven from a single power source such as a gasoline engine. The separate wheel drives are controlled by separate levers. Operating two levers to control the speed of the wheels for straight traveling across a field or turning at the ends is cumbersome and tiresome. A single lever control has been developed utilizing two sets of hydraulic pumps and motors with each set driving a respective wheel. The single lever operates the swash plates of the hydraulic pumps to control the outputs of the pumps and the hydraulic motors connected thereto. This control is very delicate and precise and the two pumps should preferably be located close together for balanced linkage relation between the control lever and the respective hydraulic pumps. Also, the pumps should preferably be firmly mounted and connected together to maintain the same positions over the operating range.

A particular feature is the driving of both pumps from the single engine drive. The hydraulic pumps are connected to the power source by a single drive. For lower cost it is preferable that a belt and pulley drive connects the pumps to the power source. The driven pulley should be rigidly mounted in relation to the pumps and axially aligned with the input shafts of the pumps.

It is, therefore, the purpose of this invention to provide a rigid mounting means for two hydraulic pumps and for a pulley shaft driving the input shafts of the pumps.

OBJECTS AND SUMMARY OF THE INVENTION An object of this invention is to provide rigid mounting means for two hydraulic pumps and the output shaft of the belt and pulley drive connected to a power source.

Another object of this invention is to provide rigid mounting means for supporting two hydraulic pumps in close proximity to one another for comparative control of the outputs of the hydraulic pumps. 7

In summary the mounting means comprises a main transversely extending beam and two longitudinally extending attaching flanges and two longitudinal bearing supports with the attaching flanges and the bearing supports holding the input shafts of hydraulic pumps and drive shaft in axial alignment.

These and other objects and advantages of this invention will be apparent from the following description and claims taken in connection with the accompanying drawing which illustrates the various features of this invention.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. I is a top view ofthe mounting means with the hydraulic pumps and driving pulley mounted thereon.

FIG. 2 is a side view of FIG. I.

FIG. 3 is a fragmentary sectional view of a modification of the mounting means.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT The agricultural harvesting machine frame is represented by the two longitudinally extending frame members 10,11. In FIG. I the mounting means 12 is positioned between the beams 10,11 and has a transversely and vertically extending main transverse beam 13 positioned forwardly.

The beam 13 has a generally U-shaped cross section with an upper extension 17 having a top surface 50 and side surfaces 51. The flanges or attaching means 14,15 extend longitudinally from opposite ends of the beam and are parallel to the frame members 10,11. The main beam is connected to flanges 14,15 along the forward parts so that the flanges project rearwardly from the main beam to impart a generally U-configuration to the mounting means and to form a space 16 between the flanges extending across the rear of the main beam.

The flanges have outwardly facing sides 14a,15a engaging the facing sides of the beams 10,1 1 and are secured thereto by fastening means such as nuts and bolts (not shown). Openings 20,21 are provided in the supports 10,11 and cylindrically shaped bosses 22,23 extend through the openings 20,21. The hydraulic pumps 24,25 are mounted on these bosses. Passages 22a,23a extend through the bosses 22,23 and flanges 14,15, respectively, to receive fittings on the pumps for axially aligning the pumps. The pumps have input shafts 24a,25a extending through the respective passages 22a, 23a in axial alignment into the space 16.

The output pulley 30 of the belt and pulley drive 31 coupled to the power source (not shown) is fastened to the shaft 32 which is rotatably mounted in the bearings (not shown) supported and retained by the L-shaped supports 33,34. The L- shaped supports have longitudinal portions 33a,34a and connecting portions 33b,34b. The longitudinal portions extend rearwardly from the lower part of the main beam 13 and parallel to the flanges 14,15 and to one another. The connecting portions 33b,34b join the ends of the longitudinal portions and the parts of the flanges on the other side of pumps from the beam. The longitudinal portions have bearing straps 35,36 bolted thereto for holding bearings (not shown). The pulley shaft 32 is mounted in the bearings and extend therethrough into the spaces 37,38 formed by the L-shaped supports with the flanges. The pulley shaft is axially aligned with the shafts of hydraulic pumps. Flexible couplings 42,43 between the ends of the pulley shaft and the hydraulic pump shafts compensate for any slight misalignment.

The pulley 30 is positioned between the L-shaped supports and in the space 16. The belts 39 connect the pulley to the drive pulley (not shown) on the tractor engine (not shown).

The pintle arms 44,45 on top of the hydraulic pumps 24,25 are connected to the pump swash plates (not shown) and are pivoted through arcs A. The beams 10,11 have slots 20,21 through which the pintle arms extend for connection to a linkage system (not shown) between the beams including a single control lever (not shown). The control lever is positioned forwardly of the mounting means. The top and side surfaces 50 and 51, respectively, of the beam may be used to support elements (not shown) of the operating elements.

In FIG. 3 a fragmentary view of the left hydraulic pump 54 and block portion 53 are shown. The boss is omitted and the hydraulic pump 54 is attached directly to the flange 56 with the key portion 54a of the pump fitting into the opening 57 in the flange to properly position on pump in relation to the other. Right side flange (not shown) is identical and the right side pump (not shown) correspondingly fits thereon.

It is thus seen from the foregoing description that the mounting means is a single cast piece forming a rigid structure. The spaced parallel flanges support the hydraulic pumps in facing axial alignment and attach the mounting means with the pumps to beams of the tractor frame. The facing relation of pumps permits the pintle arms connected to the swash plates to extend through the frame members into the space between the frame members and over the mounting means. The upper surfaces of the upper extension may support elements cooperating with the pintle arms to operate the speed and turning of the tractor. The facing relation of the ends of the hydraulic pump also provides for the driving of the pumps by a single belt and pulley drive from the power source (not shown).

While this invention has been described in connection with a single embodiment, it will be understood that this embodiment is capable of modification and that this application is intended to cover any variations, uses, or adaptations following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice in the art to which the invention pertains, and as fall within the scope of the invention or the limits of the appended claims.

Iclaim:

1. In a self-propelled tractor having two parallel longitudinally extending transversely spaced frame members, a main member having a rigid transversely extending beam and two longitudinally extending flanges form rigidly with said transversely extending portion, means for securely mounting said flanges to said frame members, hydraulic pumps having shafts, said flanges having openings for passing said shafts of said hydraulic pumps and means for mounting said shafts in axial alignment and extending toward one another, L-shaped members with respective portions normal to said transversely extending beam and said flanges respectively to form spaces therewith, shaft bearings mounted on said portions extending from said transversely extending beam for rotatably supporting a shaft in axial alignment with hydraulic pump shafts.

2. In a self-propelled tractor as set forth in Claim 1 wherein a shaft is provided for driving said pumps rotatable mounted in said shaft bearings in axial alignment with said pump shafts and coupling means are provided in said spaces attached to said driving shaft and a respective pump shaft.

3. In a self-propelled tractor as set forth in Claim 1 wherein said flanges extend to one side of said beam to impart a generally U-shape to said mounting means and position said openings to one side of said beam with said shafts between said flanges.

4. In a self-propelled tractor as set forth in Claim 1 wherein said pumps have pintle arms connected to a respective pump and extend through said frame members above said mounting means. I

5. ln a self-propelled tractor as set forth in Claim 1 wherein said flanges have bosses extending through said frame members and said pumps are mounted thereon.

6. In a self-propelled tractor as set forth in Claim 1 wherein said pumps extend through said beams and are mounted on said flanges.

7. In a self-propelled tractor as set forth in Claim 1 wherein said beam has a transverse top surface to which operating elements may be attached.

8. In a self-propelled tractor as set forth in Claim 1 wherein said beam has side surfaces for mounting of operating elements.

9. In a selfpropelled tractor as set forth in Claim 1 wherein said beam is vertical. 

